Venice Single Board Computer Operating Manual
USB Ports
The processor includes two USB ports. The default processor supports USB 2.0. Future
SOMs may support USB 3.0. One port is connected to a OTG Type-B connector and
the other to a USB Hub, which is routed to Mini-PCIe sockets. Mini-PCIe sockets also
receive USB signalling. The USB ports support low-speed 1.5Mbps transfers, full-speed
12Mbps transfers, and high- speed 480Mbps transfers. The SBC is configured as a
Downstream Facing Port capable of sourcing 5V at 1.5A. The output power is enabled
through a CPU GPIO signal (GPIO[1]:DIO[12]) and the current fault monitoring is
monitored through another CPU GPIO signal (GPIO[1]:DIO[13]).
Peripheral Expansion
The SBC includes a peripheral expansion connector that supports digital I/O, serial I/O,
analog input, system reset, I2C and power.
Digital I/O
There are several general purpose digital I/O signals supported with CPU GPIO
digital I/O signals. The 3.3V digital I/O signals support 10mA drive current, 10mA
sink current, and signal conditioning in the form of a series 332 ohm resistor.
Serial I/O
The serial interface is available through several UARTs as defined in the
connector section in this document. Several UARTs are routed through a
programmable transceiver supporting RS232 and RS485 (half duplex and full
duplex). Another UART is routed to the optional GPS and a header for TTL
levels.
Analog Input
There are two analog inputs that are available through the Gateworks System
Controller. The 0 to 5V analog input is divided by two.
System Reset
The system reset signal is connected to the Gateworks System Controller
pushbutton input and supports all of the associated features. This includes
generating an interrupt, system reset, and powering the SBC on and off.
I2C Two Wire Interface
An I2C interface is offered.The 3.3V two wire interface supports standard
SCL/SDA protocols up to 400KHz with 7-bit and 10-bit addressing in both master
and slave operation. The two wire interface is supported with the processor port
and includes pull up resistors on both signals.
More information can be found at the following links:
●
http://trac.gateworks.com/wiki/I2C
GATEWORKS.COM 3026 S. Higuera St San Luis Obispo, CA 93401
P:(805)781-2000
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